Aquaforest Filter Socks QQ2 which converts harmful ammonia and

which converts harmful ammonia and nitrite in to the less harmful nitrate

but do not freeze

If either becomes deficient

Natural phytohormone supplement for the planted aquarium

Aquaforest Filter Socks QQ2 which converts harmful ammonia andAF Filter Sock Medium 4" Medium sock for mechanical filtration. Effectively catches dirt and purifies water of all kinds of suspensions, dusts and food residues. The filter sock effectively catches dirt and purifies water of all kinds of suspensions, dusts and food residues. total length: 30,5 cm outer diameter: 10,5 cm inner diameter: 9,3 cm XL 7" Large sock for filtration media. The filter sock provides an excellent water flow and a full use of the